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From e88fb243213c6209b0684fab6d7c8a8ea9a14c61 Mon Sep 17 00:00:00 2001
From: "Tao.Huang" <Tao.Huang@amd.com>
Date: Mon, 6 May 2019 16:26:54 +0800
Subject: [PATCH 2065/2940] drm/amd/display: fix resource saving missing when
power state switch
Signed-off-by: Tao.Huang <Tao.Huang@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 0536e32e60b0..edb070ca1dec 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1941,6 +1941,12 @@ void dc_set_power_state(
enum dc_acpi_cm_power_state power_state)
{
struct kref refcount;
+ struct display_mode_lib *dml = kzalloc(sizeof(struct display_mode_lib),
+ GFP_KERNEL);
+
+ ASSERT(dml);
+ if (!dml)
+ return;
switch (power_state) {
case DC_ACPI_CM_POWER_STATE_D0:
@@ -1957,15 +1963,20 @@ void dc_set_power_state(
/* Preserve refcount */
refcount = dc->current_state->refcount;
+ /* Preserve display mode lib */
+ memcpy(dml, &dc->current_state->bw_ctx.dml, sizeof(struct display_mode_lib));
+
dc_resource_state_destruct(dc->current_state);
memset(dc->current_state, 0,
sizeof(*dc->current_state));
dc->current_state->refcount = refcount;
+ dc->current_state->bw_ctx.dml = *dml;
break;
}
+ kfree(dml);
}
void dc_resume(struct dc *dc)
--
2.17.1
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